In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Q: Article: The concept of solar power satellites, or SPS, first put forward in the 1960s, is still not widely known by the general public. For example, at many public exhibitions about energy, SPS is not even mentioned. This is mainly because very little money has been spent on SPS research There are people who claim that SPS is unrealistic - because launch costs are much too high today; or because it is too far away. So why do we believe that it is important to continue to do researches on SPS? The reason is very simple. Humans are going to need huge amounts of electric power in coming decades. Within 50 years the world population is expected to double, while economic growth will continue around the world, especially in the poorer countries. But existing energy sources already face serious problems. They are limited; they are polluted; they are dangerous. So 50 or 100 years from now, where is our power going to come from? Nobody knows. And so we believe that new large-scale possibilities should be studied further. We must remember that humans have some choices concerning our future. To some extent we can choose the direction in which our civilization develops. And choices that are made in the coming decades - such as the energy sources that we will or will not use, will have major, long-term meaning for human life on earth. We believe that if research continues to show that SPS is environmentally and economically attractive, SPS will open the door to a much more attractive future for human civilization than any ground-based energy source, and one that the public will support and that young people will find challenging and exciting. Furthermore energy from SPS can be readily used in developing countries, as the SPS 2000 project will show, thus aiding economic development worldwide. In addition, by creating large commercial fund for space engineering, SPS will open the frontier of space to economic development, thus creating a limitless new field for the growth of the world economy. 
 Answer: The Future Energy- SPS

A: Which of the following may be the best title for the passage?
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Q: Article: Maybe you don't know the fact that the green forests we see from an airplane or from the highway can be false. Because centuries ago forests were twice as many as what they are today. A hike into many of those woods will tell different stories, too--of diseases and insects that are slowly killing trees, of some forests that are burned by fire, of logging that local people do more often. Deforestation  and degradation   of the world's forests mainly harm the basic ability of those ecosystems   to function or provide services, such as fresh water, air, plants and animals, which benefit people everywhere and keep the balance of nature.  Deforestation Forests today are a small part of what they once were. Nearly half of the world's forest cover is gone, and each year 40 million acres more are cut and replaced by agriculture and development. Over the next 45 years, wood use in the world is guessed to increase by 50 per cent over its present rate. Many of the forests that remain are severely destroyed, which harms the ability to protect birds or wild animals, and to supply natural resources to people. Deforestation also brings about between 20 per cent and 25 per cent of all air pollution causing global climate change. Degradation Forests continue to be degraded by some uses such as the gathering of wood for fuel, the arrival of pests and diseases that kill trees, the effects of climate change and poor management such as the fire, flood and so on. 
 Answer: The ability of the ecosystems to function.

A: What do deforestation and degradation of the forests mainly harm?
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Q: Article: A man claiming to be a pastor  apparently tried to stiff a waiter on a tip, explaining that his work for God allowed him not to leave one.  A photo of the receipt, posted to Reddit.com, shows a bill for $34.93 with an automatic 18 percent gratuity  (or $6.29) added above a blank space for an additional tip.  "I give God 10%," the diner wrote on the receipt, scratching out the automatic tip. "Why do you get 18?" He then wrote "Pastor" above his signature, and an emphatic "0" where the additional tip would be. (The automatic gratuity, however, had already been added to the total.) The Reddit user who submitted the image explained in the comments section that the receipt was part of a total bill for a party of 20, which is why the gratuity was automatically added. "Parties up to eight ... may tip whatever they'd like, but larger parties receive an automatic gratuity," the server wrote. "It's in the computer; it's not something I do." The server added: "They had no problem with my service, and told me I was great. They just didn't want to pay when the time came."  Scribbling  notes on receipts has become something of a trend. Earlier this month, the manager of a North Carolina Red Robin surprised an overdue pregnant woman by comping her meal. "Once seated, a manager came up to us and started talking," the woman's husband told Consumerist. "He was extremely friendly and jokingly asked my wife if this was her last meal before heading to the hospital." When the check came, a note from the manager next to her portion of the bill read: "MOM 2 BEE GOOD LUC." "It was a pleasant surprise and made my tired-of-being-pregnant wife a little more cheery," the man said. 
 Answer: He didn't mean to pay the gratuity at all.

A:
What did the pastor mean by saying, "I give God 10%. Why do you get 18?"
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